Improvement in combined steam-generator and stove



L. F. BANCROFT.

Cooking Stove.

w No. 91,069. Patented June 8, 1869 I711) nform did-1rd grates intentjifiirn.

Letters Patent No. 91,069, dated June 8, 1869.

IMPROVEMENT IN COMBINED STEAM-GENERATOR AND strove.

The Schedule referred to in these Letters Patent and making part of thesame.

Know all men by these presents:

,That I, L. F. BANCROFT,-0f the city and county of Worcester, andCommonwealth of Massachusetts, have invented certain -new and usefulImprovements in Combined Stove and Steam-Generator, of which thefollowing is a full, clean-and exact description, reference being had tothe accompanying drawings, forming a part of this specification, inwhich- Figure 1 represents a side view of so much of a stove andsteam-boiler as is necessary to illustrate my present improvement, 2.portion of the side of the stove being shown broken away, and

Figure 2 representsa front view of the same, with the front part of thestove broken away, or in section.

To enable those skilled in the art to which my invention belongs, tomake and use the same, I will describe it more in detail.

- The nature of my invention consists in the combination, with a commonor ordinary cooking-stove, of a steam-generator, as will be hereafterexplained.

In the drawings A represents the bottom part of a stove;

B, the top; and

O, the fire-chamber, all of which parts may be made in any of thewell-known modes.

' Upon the rear part of the stove is arrangedthe steam-generator D, uponthe top of which is a detachable fire-chamber or drum, E, from whichpasses a smoke or draught-pipe, E, and in which is arranged a damper, a.

Another smoke or draught-pipe, Gfhads from the rear part of the stove,and enters the smoke-pipe F back of the damper a, as indicated in fig.1.

The rear part of the top stove-plate, under the bottom of the boiler D,is cored out, to admit of the heated air and gas coming in contact withthe bottom of the boiler.

Small tubular fines pass up through the boiler, and by which theheatedair, is conducted through the water in the boiler to the drum E,from which it passes to the chimney, through the smoke-pipe F.

By closing damper a, and opening damper b, the heated air is conductedofi' without passing through the boiler.

From the bottom of the boiler a water-pipe, H, runs to the water-chamberor back I, in the back of the fire-chamber. The end of said pipe mayextend down into and near to the bottom of the water-chamber I, asindicated 'in dotted lines, fig. 2.

From the top of the opposite end of the waterchamber I, another pipe, J,extends back in an upward direction, and enters the bottom of the boilerat the opposite endfrom the pipe H.

From the bottom of the right-hand end of waterchanibcr I, a pipe, K,extends forward to near the front of the fire-chamber 0, then turns andruns along the front side of said chamber, then turns and enters thewater-chamber I, at the left upper corner, as fully indicated in thedrawings.

Fuel being placed in the fire-chamber O of the stove, and ignited, theheat therefrom generates steam from the water in pipe K, and theWater-chamber I. The steam, as it is generated in. pipe K, passe's upthrough said inclined pipe into chamber I, and from thence, through theinclined pipe J, to the boiler D,

and thence, through pipe L, it maybe drawn for heating andwarming-purposes, as before explained.

The water-chamber, if the upper part is made horizontal, as indicated inthe drawings, should -be provided with an inside filling along its upperedge, of the form indicated by dotted lines, fig. 2, for the purpose ofconducting the steam, as it rises to the top of chamber I, to the end inwhich pipe J is inserted.

It will be seen that the arrangement of pipes and water-chambers is suchthat the steam is conducted away from the generating-points as fast asgenerated, and that a fresh supply of water is constantly passing downthrough pipe H, whereby chamber I and pipe K will always be properlysupplied with water, so long as there is any in the boiler.

It will be understood thatasafety-valve is to be applied to thesteam-pipe L, in some one of the wellknown modes.

The drum E being always warm, furnishes a very convenient stand uponwhich to place articles to be slightly warmed.

In cases where a head of water can be obtained, the boiler may be keptsupplied by an automatic-operating valve.

As the upper end of pipe J projects up into boiler D, as indicated indotted lines, fig. 2, a constant and perfect circulation of water andsteam through chamher I and-pipe K is insured.

Having described my combined stove and steamboiler,

' What I claim as new, and of my invention, and dcsire to secure byLetters Patent, is

l. The combination, with the rear part of the upper plate of thecooking-stove, of a steam-generator, D, and draught-fines, G F,substantially as set forth.

2. The combination, with the stove A, and boiler D, of water-chamber I,pipes H J, drum E, and smoke or draught-fines G and 1*, provided withdampers a I), said parts being arranged, in r elation to each other,

substantially as set forth.

L. F. BANOROFT. \Vitnesses:

Tnos. H. Donen, D. L. MILLER.

